Automatic demolding device for stamping of sheet metal parts

Abstract

The invention discloses a sheet metal part stamping automatic demolding device which comprises a rack, a downward pressing moving block, a crankshaft connecting rod mechanism, a workbench and a demolding assembly, the workbench is arranged on the rack in a liftable mode, a lower mold is arranged on the upper surface of the workbench, the downward pressing moving block is arranged above the workbench in a liftable mode, and the crankshaft connecting rod mechanism is arranged on the lower surface of the workbench. The lower surface of the workbench is provided with an upper mold matched with the lower mold, the crankshaft connecting rod mechanism is arranged on the rack and used for driving the downward-pressing moving block to ascend and descend in a reciprocating mode, and the demolding assembly is arranged in the workbench and used for demolding sheet metal parts on the lower mold. According to the automatic demolding device, the defect that some people cannot competent for the work due to the fact that the height of the workbench cannot be adjusted according to the height of a user because the descending degree of the pressing block cannot be adjusted by the automatic demolding device for stamping the sheet metal part through a cam connecting rod mechanism is overcome. Therefore, the automatic demolding device for stamping the sheet metal part through the cam connecting rod mechanism can control the descending degree of the pressing block.

Description

Technical Field

[0001] The invention relates to the field of stamping dies, and in particular to an automatic demoulding device for stamping a sheet metal part. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, pipes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. Stamping and forging belong to plastic processing (or pressure processing), collectively known as forging. The blanks for stamping are mainly hot-rolled and cold-rolled steel plates and strips. 60-70% of the steel in the world is sheet material, most of which is stamped into finished products. The car body, chassis, fuel tank, radiator fins, boiler drum, container shell, motor, electrical appliance iron core silicon steel sheet, etc. are all stamped. There are also a large number of stamped parts in products such as instruments and meters, household appliances, bicycles, office machinery, and daily utensils.

[0003] The sheet metal stamping automatic demoulding device currently implemented by the cam-link mechanism cannot adjust the degree of descent of the pressing block, and thus cannot adjust the height of the workbench according to the height of the user, resulting in some people being unable to perform the job.

[0004] Therefore, it is an urgent problem to be solved by the present invention to provide a sheet metal stamping automatic demoulding device realized by a cam-linkage mechanism that can control the degree of descent of the pressing block. Summary of the invention

[0005] In view of the above technical problems, the purpose of the present invention is to overcome the problem that the sheet metal stamping automatic demoulding device realized by the cam connecting rod mechanism in the prior art cannot adjust the degree of descent of the pressing block, and thus cannot adjust the height of the workbench according to the height of the user, resulting in some people being unable to perform the work. Thus, a sheet metal stamping automatic demoulding device realized by the cam connecting rod mechanism is provided, which can control the degree of descent of the pressing block.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an automatic demoulding device for stamping sheet metal parts, the device comprising: a frame, a downward pressing moving block, a crankshaft connecting rod mechanism, a workbench and a demoulding assembly, the workbench can be lifted on the frame, and a lower mold is arranged on its upper surface, the downward pressing moving block can be lifted above the workbench, and an upper mold matched with the lower mold is arranged on its lower surface, the crankshaft connecting rod mechanism is arranged on the frame to drive the downward pressing moving block to lift and lower, and the demoulding assembly is arranged inside the workbench to make the lower mold Sheet metal demolding; wherein the crankshaft connecting rod mechanism includes: a first drive motor, a crankshaft, a moving rod, a first drive assembly and a connecting rod, the crankshaft is horizontally rotatably arranged above the downward-pressing moving block, the first drive motor is arranged on the frame to drive the crankshaft to rotate, the opposite ends of the moving rod are respectively movably arranged on the protruding parts of the crankshaft body, the first drive assembly is arranged on the protruding parts of the crankshaft body to drive the opposite ends of the moving rod to move synchronously, one end of the connecting rod is hinged to the moving rod body, and the other end is hinged to the downward-pressing moving block.

[0007] Preferably, the first driving component includes: a second driving motor and a first screw rod, first limit sliders are respectively provided at opposite ends of the moving rod, the protruding part of the crankshaft body is provided with a first limit sliding groove matched with each first limit slider, at least one second driving motor is provided on the crankshaft, and the first screw rod is coaxially provided on the output shaft of the second driving motor, the first screw rod body is threaded through the moving rod body, and is rotatably provided on the crankshaft.

[0008] Preferably, a slide rail is arranged on the frame along the vertical direction, and a second limiting sliding block matched with the slide rail is arranged on the downward moving block.

[0009] Preferably, a clamping frame is telescopically provided on the lower surface of the downward pressing movable block, and a plurality of first guide rods are provided on the upper surface of the clamping frame vertically extending into the interior of the downward pressing movable block, and a first elastic member is respectively sleeved on each of the first guide rods, one end of the first elastic member is abutted or fixedly connected to the lower surface of the downward pressing movable block, and the other end is abutted or fixedly connected to the upper surface of the clamping frame, and a first hole groove matched with the upper mold is provided on the clamping frame, and first placing tables are respectively protruded on opposite sides of the lower mold.

[0010] Preferably, a second limiting slide groove is arranged on the frame in the vertical direction, a third limiting slider matched with the second limiting slide groove is arranged on one side of the workbench, a third driving motor is also arranged on the frame, and a second screw rod is coaxially arranged on its output shaft, the second screw rod has a vertical thread passing through the workbench and is rotatably arranged on the frame.

[0011] Preferably, the demolding assembly includes: a lifting plate, a demolding plate and a linear drive motor. The lifting plate can be lifted and lowered inside the workbench by the linear drive motor. The demolding plate is arranged on the upper surface of the workbench, and a second placing table is arranged on the surface. A connecting column is vertically arranged on the upper surface of the lifting plate, and the upper end of the connecting column is fixedly connected to the demolding plate.

[0012] Preferably, a second hole groove having a hole diameter larger than the maximum radius of the lower mold is coaxially arranged in the middle of the second placement table.

[0013] Preferably, a second guide rod is coaxially arranged inside the lower mold so as to be liftable, and the second guide rod body is sleeved with a second elastic member, one end of the second elastic member abuts or is fixedly connected to the second guide rod body, and the other end abuts or is fixedly connected to the lower mold, and the lifting and moving block is arranged on the upper surface of the lifting plate so as to be reciprocatingly movable in the horizontal direction, and the side thereof close to the lower end of the second guide rod is arranged in a slope shape, an inclined frame is arranged on one side of the second guide rod obliquely passing through the lifting and moving block, and an avoidance groove for avoiding the inclined frame is arranged on the lifting and moving block.

[0014] Preferably, fourth limit sliding blocks are respectively provided on two opposite sides of the lifting and moving block, and a third limit sliding groove matched with the fourth limit sliding blocks is provided on the upper surface of the lifting plate.

[0015] According to the above technical scheme, the beneficial effect of the present invention compared with the prior art is: the user of the present invention adjusts the height of the workbench before use, and then starts the first driving component to drive the moving rod to move, thereby adjusting the degree of descent of the downward moving block through the connecting rod, so as to adjust the height of the workbench according to the height of the user, making the device applicable to a wider group of people.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation mode; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A three-dimensional automatic demoulding device for sheet metal stamping provided in a preferred embodiment of the present invention Figure 1 .

[0019] Figure 2 A three-dimensional automatic demoulding device for sheet metal stamping provided in a preferred embodiment of the present invention Figure 2 .

[0020] Figure 3 It is a partial three-dimensional diagram of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention. Figure 1 .

[0021] Figure 4 It is a partial three-dimensional diagram of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention. Figure 2 .

[0022] Figure 5 It is a partial three-dimensional diagram of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention. Figure 3 .

[0023] Figure 6 It is a partial three-dimensional diagram of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention. Figure 4 .

[0024] Figure 7 It is a partial plan view of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention.

[0025] Figure 8 It is a partial plan cross-sectional view of a sheet metal part stamping automatic demoulding device provided in a preferred embodiment of the present invention.

[0026] Fig. 9 It is a partial three-dimensional diagram of a sheet metal stamping automatic demoulding device provided in a preferred embodiment of the present invention. Figure 5 .

[0027] Description of reference numerals: 1-frame; 101-slide rail; 102-second limiting slide groove; 103-third driving motor; 104-second screw rod; 2-pressing moving block; 201-upper mold; 202-second limiting slider; 203-pressing frame; 20301-first guide rod; 20302-first elastic member; 20303-first hole groove; 3-crankshaft connecting rod mechanism; 301-first driving motor; 302-crankshaft; 30201-first limiting slide groove; 303-moving rod; 30301-first limiting slider; 304-first driving assembly; 304 01-second drive motor; 30402-first screw rod; 305-connecting rod; 4-workbench; 401-lower mold; 402-third limit slider; 5-demolding assembly; 501-lifting plate; 50101-connecting column; 50102-third limit slide groove; 50103-avoidance groove; 502-demolding plate; 50201-second placement table; 50202-second hole groove; 503-linear drive motor; 504-second guide rod; 505-second elastic member; 506-lifting moving block; 50601-fourth limit slider; 507-tilt frame. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are used to indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the invented product is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, it does not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1-Figure 6: An automatic demoulding device for stamping sheet metal parts, the device comprises: a frame 1, a downward pressing moving block 2, a crankshaft connecting rod mechanism 3, a workbench 4 and a demoulding assembly 5, the workbench 4 is escalably arranged on the frame 1, and a lower mold 401 is arranged on its upper surface, the downward pressing moving block 2 is escalably arranged above the workbench 4, and an upper mold 201 adapted to the lower mold 401 is arranged on its lower surface, the crankshaft connecting rod mechanism 3 is arranged on the frame 1, and is used to drive the downward pressing moving block 2 to reciprocate and rise and fall, and the demoulding assembly 5 is arranged inside the workbench 4, and is used to demould the sheet metal parts on the lower mold 401; wherein, the crankshaft connecting rod mechanism 3 includes It includes: a first driving motor 301, a crankshaft 302, a moving rod 303, a first driving assembly 304 and a connecting rod 305, wherein the crankshaft 302 is horizontally rotatably arranged above the downward moving block 2, the first driving motor 301 is arranged on the frame 1 to drive the crankshaft 302 to rotate, the opposite ends of the moving rod 303 are movably arranged on the protruding parts of the crankshaft 302, the first driving assembly 304 is arranged on the protruding parts of the crankshaft 302 to drive the opposite ends of the moving rod 303 to move synchronously, one end of the connecting rod 305 is hinged to the rod body of the moving rod 303, and the other end is hinged to the downward moving block 2.

[0033] Before use, the user of the present application adjusts the height of the workbench 4, and then starts the first driving component 304 to drive the moving rod 303 to move, thereby adjusting the degree of descent of the downward moving block 2 through the connecting rod 305, so as to adjust the height of the workbench 4 according to the height of the user, making the device applicable to a wider group of people.

[0034] Reference Figure 4 and Figure 5 The first driving component 304 includes: a second driving motor 30401 and a first screw rod 30402, the first limit sliders 30301 are respectively provided at the opposite ends of the moving rod 303, the protruding part of the crankshaft 302 is provided with a first limit slide groove 30201 adapted to each first limit slider 30301, at least one second driving motor 30401 is provided on the crankshaft 302, and the output shaft of the second driving motor 30401 is coaxially provided with a first screw rod 30402, the rod body of the first screw rod 30402 is threaded through the rod body of the moving rod 303, and is rotatably provided on the crankshaft 302.

[0035] In the present application, each second driving motor 30401 is started to drive each first screw rod 30402 to rotate synchronously, so that the moving rod 303 moves horizontally, and the descending degree of the downward moving block 2 is adjusted through the connecting rod 305.

[0036] Reference Figure 2 and Figure 3: A slide rail 101 is arranged on the frame 1 along the vertical direction, and a second limiting slider 202 adapted to the slide rail 101 is arranged on the downward pressing moving block 2.

[0037] The downward moving block 2 of the present application is assembled on the slide rail 101 in a liftable manner through the second limiting slider 202, ensuring that it can be lifted and lowered stably without deviation.

[0038] Reference Figure 3 and Figure 4 : A clamping frame 203 is telescopically provided on the lower surface of the downward pressing moving block 2, and a plurality of first guide rods 20301 are provided on the upper surface of the clamping frame 203 which vertically extend into the interior of the downward pressing moving block 2. A first elastic member 20302 is respectively sleeved on each of the first guide rods 20301, and one end of the first elastic member 20302 is abutted or fixedly connected to the lower surface of the downward pressing moving block 2, and the other end is abutted or fixedly connected to the upper surface of the clamping frame 203. The clamping frame 203 is provided with a first hole groove 20303 which is compatible with the upper mold 201, and first placing tables are respectively protruded on opposite sides of the lower mold 401.

[0039] In the present application, the sheet metal is suspended on the first placement table at two opposite sides. When the pressing movable block 2 is descending, the pressing frame 203 cooperates with the first placement table at two opposite sides to press the sheet metal on the first placement table. Then the pressing movable block 2 continues to descend, and the pressing frame 203 compresses the first elastic member 20302 along the direction of the first guide rod 20301 and retracts it into the lower moving block. At the same time, the upper mold 201 passes through the first hole groove 20303 to cooperate with the lower mold 401 to achieve the shaping of the sheet metal. The first placement table described in this embodiment is not drawn in the figure.

[0040] Reference Figure 3 and Figure 6 : A second limiting slide groove 102 is arranged on the frame 1 in the vertical direction, and a third limiting slider 402 adapted to the second limiting slide groove 102 is arranged on one side of the workbench 4. A third driving motor 103 is also arranged on the frame 1, and a second screw rod 104 is coaxially arranged on its output shaft. The second screw rod 104 vertically threads through the workbench 4 and is rotatably arranged on the frame 1.

[0041] The workbench 4 of the present application is assembled in the second limiting sliding groove 102 so as to be liftable via the third limiting sliding block 402. The third driving motor 103 is started to drive the second screw rod 104 to rotate, thereby driving the workbench 4 to be lifted and lowered without displacement.

[0042] Reference Figure 7 and Figure 8The demolding assembly 5 includes: a lifting plate 501, a demolding plate 502 and a linear drive motor 503. The lifting plate 501 is lifted and lowered inside the workbench 4 by the linear drive motor 503. The demolding plate 502 is arranged on the upper surface of the workbench 4, and a second placement table 50201 is arranged on its surface. A connecting column 50101 is vertically arranged on the upper surface of the lifting plate 501, and the upper end of the connecting column 50101 is fixedly connected to the demolding plate 502.

[0043] In the present application, the linear drive motor 503 is started to drive the lifting plate 501 to rise, thereby driving the stripping plate 502 to rise through the connecting column 50101, thereby bringing the stamped sheet metal part out of the lower mold 401 to complete the demolding.

[0044] Reference Figure 8 and Fig. 9 : A second hole groove 50202 with a hole diameter larger than the maximum radius of the lower mold 401 is coaxially arranged in the middle of the second placement table 50201.

[0045] This design is used in the present application to ensure that when the sheet metal part that has been shaped is demolded, the surrounding side of the sheet metal part can be evenly stressed to prevent the sheet metal part from being deformed.

[0046] Reference Figure 7 and Figure 8 : A second guide rod 504 is coaxially arranged inside the lower mold 401 so as to be liftable, and a second elastic member 505 is sleeved on the rod body of the second guide rod 504, one end of the second elastic member 505 abuts or is fixedly connected to the rod body of the second guide rod 504, and the other end abuts or is fixedly connected to the inside of the lower mold 401, the lifting and moving block 506 is arranged on the upper surface of the lifting plate 501 so as to be reciprocable in the horizontal direction, and a side thereof close to the lower end of the second guide rod 504 is arranged in a slope shape, a tilting frame 507 is arranged on one side of the second guide rod 504 obliquely passing through the lifting and moving block 506, and an avoidance groove 50103 is arranged on the lifting plate 501 for avoiding the tilting frame 507.

[0047] The present application realizes secondary demolding through such a design. In the initial state, the sloped side wall of the lifting and moving block 506 is still one end distance away from the lower end of the second guide rod 504. When the linear drive motor 503 is started to drive the lifting plate 501 to rise, the demolding plate 502 will first eject the peripheral part of the sheet metal out of the lower mold 401, and then the sloped side wall of the lifting and moving block 506 will contact the lower end of the second guide rod 504, thereby driving the second guide rod 504 to compress the second elastic member 505 in the vertical direction to rise, and then eject the sheet metal from the inside for a second time. The secondary demolding mechanism can quickly and stably remove the molded parts from the mold, thereby reducing the production cycle and improving production efficiency. During the working process of the secondary demolding mechanism, reasonable mechanical design and lubrication measures can be used to effectively protect the mold and molded parts and reduce the possibility of damage and deformation.

[0048] Reference Fig. 9 : The fourth limiting sliding blocks 50601 are respectively arranged on the opposite sides of the lifting moving block 506, and the upper surface of the lifting plate 501 is provided with a third limiting sliding groove 50102 adapted to the fourth limiting sliding blocks 50601.

[0049] The lifting moving block 506 of the present application is assembled in the third limiting sliding groove 50102 through the fourth limiting sliding block 50601, thereby ensuring that the lifting moving block 506 can reciprocate toward the lower end of the second guide rod 504 without being offset.

[0050] The device provided by the present invention adjusts the height of the workbench 4 before use by the user, and then starts the first driving component 304 to drive the moving rod 303 to move, thereby adjusting the degree of descent of the downward moving block 2 through the connecting rod 305, so as to adjust the height of the workbench 4 according to the height of the user, making the device applicable to a wider group of people.

[0051] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0053] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An automatic demoulding device for sheet metal stamping, characterized in that: The device comprises: a frame (1), a downward pressing moving block (2), a crankshaft connecting rod mechanism (3), a workbench (4) and a demoulding assembly (5); the workbench (4) is movably arranged on the frame (1), and a lower mold (401) is arranged on its upper surface; the downward pressing moving block (2) is movably arranged above the workbench (4), and an upper mold (201) matched with the lower mold (401) is arranged on its lower surface; the crankshaft connecting rod mechanism (3) is arranged on the frame (1) to drive the downward pressing moving block (2) to move up and down reciprocatingly; the demoulding assembly (5) is arranged inside the workbench (4) to demould the sheet metal part on the lower mold (401); wherein, The crankshaft connecting rod mechanism (3) comprises: a first drive motor (301), a crankshaft (302), a moving rod (303), a first drive assembly (304) and a connecting rod (305); the crankshaft (302) is horizontally rotatably arranged above the downward moving block (2); the first drive motor (301) is arranged on the frame (1) to drive the crankshaft (302) to rotate; the moving rod (303) is movably arranged at opposite ends on the protruding parts of the crankshaft (302) shaft body; the first drive assembly (304) is arranged on the protruding parts of the crankshaft (302) shaft body to drive the moving rod (303) to move synchronously at opposite ends; one end of the connecting rod (305) is hinged to the shaft of the moving rod (303), and the other end is hinged to the downward moving block (2).

2. The automatic demoulding device for sheet metal stamping according to claim 1, characterized in that: The first driving component (304) comprises: a second driving motor (30401) and a first screw rod (30402); first limit sliders (30301) are respectively arranged at opposite ends of the moving rod (303); a first limit slide groove (30201) matched with each first limit slider (30301) is arranged on the protruding part of the crankshaft (302); at least one second driving motor (30401) is arranged on the crankshaft (302); a first screw rod (30402) is coaxially arranged on the output shaft of the second driving motor (30401); a rod body of the first screw rod (30402) is threadedly penetrated through the rod body of the moving rod (303), and is rotatably arranged on the crankshaft (302).

3. The automatic demoulding device for sheet metal stamping according to claim 1, characterized in that: The frame (1) is provided with a slide rail (101) in the vertical direction, and the downward moving block (2) is provided with a second limiting sliding block (202) adapted to the slide rail (101).

4. The automatic demoulding device for sheet metal stamping according to claim 1, characterized in that: A clamping frame (203) is telescopically arranged on the lower surface of the downward pressing movable block (2); a plurality of first guide rods (20301) are arranged on the upper surface of the clamping frame (203) and extend vertically into the interior of the downward pressing movable block (2); a first elastic member (20302) is sleeved on each of the first guide rods (20301); one end of the first elastic member (20302) is abutted or fixedly connected to the lower surface of the downward pressing movable block (2); and the other end is abutted or fixedly connected to the upper surface of the clamping frame (203); a first hole groove (20303) adapted to the upper mold (201) is arranged on the clamping frame (203); and first placement tables are respectively protruded on opposite sides of the lower mold (401).

5. The automatic demoulding device for sheet metal stamping according to claim 1, characterized in that: A second limiting slide groove (102) is arranged on the frame (1) in the vertical direction, and a third limiting slider (402) adapted to the second limiting slide groove (102) is arranged on one side of the workbench (4). A third driving motor (103) is also arranged on the frame (1), and a second screw rod (104) is coaxially arranged on the output shaft of the third driving motor (103). The second screw rod (104) vertically threads through the workbench (4) and is rotatably arranged on the frame (1).

6. The automatic demoulding device for sheet metal stamping according to claim 1, characterized in that: The demoulding assembly (5) comprises: a lifting plate (501), a demoulding plate (502) and a linear drive motor (503); the lifting plate (501) is arranged inside a workbench (4) so ​​as to be liftable by means of a linear drive motor (503); the demoulding plate (502) is arranged on the upper surface of the workbench (4), and a second placement platform (50201) is arranged on the surface thereof; a connecting column (50101) is vertically arranged on the upper surface of the lifting plate (501); and the upper end of the connecting column (50101) is fixedly connected to the demoulding plate (502).

7. The automatic demoulding device for sheet metal stamping according to claim 6, characterized in that: A second hole groove (50202) having a hole diameter larger than the maximum radius of the lower mold (401) is coaxially arranged in the middle of the second placement platform (50201).

8. The automatic demoulding device for sheet metal stamping according to claim 7, characterized in that: A second guide rod (504) is coaxially arranged inside the lower mold (401) so as to be liftable. The second guide rod (504) is sleeved with a second elastic member (505). One end of the second elastic member (505) abuts against or is fixedly connected to the second guide rod (504) and the other end abuts against or is fixedly connected to the lower mold (401). The lifting block (506) is arranged on the upper surface of the lifting plate (501) so as to be reciprocable in the horizontal direction, and the side close to the lower end of the second guide rod (504) is arranged in a slope shape. An inclined frame (507) is arranged on one side of the second guide rod (504) and is obliquely penetrated through the lifting block (506). An avoidance groove (50103) for avoiding the inclined frame (507) is provided on the lifting plate (501).

9. The automatic demoulding device for sheet metal stamping according to claim 8, characterized in that: The lifting moving block (506) is provided with fourth limiting sliding blocks (50601) on opposite sides thereof, and the upper surface of the lifting plate (501) is provided with third limiting sliding grooves (50102) matched with the fourth limiting sliding blocks (50601).

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